TTRPG Area of Effect Template

This is an opinionated template for determining the outcome of area of effect for spells (and explosions, etc) on a D&D tabletop with a scale of 1" = 5 feet. I did my best to include all relevant measurements for existing spells that would fit as a single print on a standard Prusa MK4 bed. The diameter of each circle is denoted on the square in which it is inscribed. The font used is Overpass, as its even stroke width makes for cleaner prints.

I printed my copy in PLA with a 0.4mm nozzle on a Prusa MK4 with 0.2mm layer heights with three color changes to improve readability. I may also end up filling the engraved text with contrasting clay or epoxy for even better legibility. You do you.

In the official DMG for Dungeons and Dragons, as well as Xanathar's Guide to Everything, multiple different descriptions and methods are given for how to adjudicate the affected area for a spell with a cone-shaped area of effect. Even within those, there is room for interpretation, and searching wide across the internet, I found many variants that are all more-or-less canon-compliant and yet differ from each other.

I was inspired to make my own template model because my favorite existing template model (the one this is listed as remixing) used an isosceles triangle for cones, rather than a sector of a circle. In my mind, if my wizard is casting a 60-foot cone of cold, the furthest that effect should ever reach is exactly 60 feet, whereas the triangle method has the corners of the cone reaching out to over 67 feet. The solution to this is to project the cone as a sector of a circle (and when the third dimension is relevant, a sector of a sphere).

Remix potential: I may at some point design extensions for this to actually handle a 60-foot cone of cold (or perhaps even larger).